Facebook is set to release over 3000 ads bought by a Russian entity to interfere in U.S. politics and the 2016 presidential election with congressional investigators tomorrow morning at 8am Pacific, a Facebook spokesperson confirmed by TechCrunch.

Facebook’s disclosure will include information on the ads’ content and targeting as well as the accounts that paid approximately $100,000 for them to run between 2015 and 2017 in the U.S. It previously announced these ads were tied to 470 accounts and Pages “associated with a Russian entity known as the Internet Research Agency.”

Facebook believes that congressional investigators for the three committees are best placed to review the ads and make determinations on them based on their access to classified intelligence and information from all relevant companies and industries, beyond Facebook own internal investigation, according to a spokesperson. Facebook does not plan to release the ad data publicly.

Congressional investigators could combine Facebook’s data with that which Twitter has pledged to provide. This includes data on 201 accounts suspected of having engaged in misinformation campaigns on Twitter, and $274,100 in spend on U.S. ads in 2016 by Russian government-linked news outlet Russia.

Facebook already shared this information with special counsel Robert Mueller around September 15th the Wall Street Journal first reported, likely because it received a search warrant, but initially withheld them from congress to avoid violating federal privacy laws or disrupting the Mueller probe. On September 21st Facebook announced that it planned to share these ads with congress, and is now confirming that tomorrow morning will be when that happens. Facebook also plans a long list of changes to its political ad buying systems which could be seen a sufficient self-regulation.